By Charlotte Klein for Vanity Fair.

By Reid Frazier of WSKG Public TV & Radio / NPR / PBS with comments from Michael Mann.

By Catherine Clifford for CNBC.

By Frank Kummer for the Philadelphia Inquirer.

By Jeff Goodell in Rolling Stone.

By Seth Borenstein for the AP.

By Patrick Cloonan for The Indiana Gazette (of Indiana, PA).

By Bill McKibben in The New Yorker.

By Allison Fisher for Media Matters for America.